Fire-door for elevator-shafts, &amp;c.



' M. GILMORE.

FIRE DOOR FOR ELEVATOR SHAFTS, dzo. APPLICATION FILED MAR.17, 1913.

1,078,275. I Patented Nov. 11, 1913.

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COLUMBIA PLANDHRAPH CO" WASHINGTON. D. C.

r wr t i MILLARD GILMORE, or cIiIcAGo, IIILINOIS, ASSEGNOR TO VARIETY MANUFACTURING ooMrANY,oFoHIoAeoILLINoIs, A CORPORATION or ILLINOIS.

I FIRE-DOOR. ronlEnEvAroR-simrrs, 8w.

Specification of Letters Patent.

Patented Nov. 11, 1913.

To all whom it may concern:

Be it known that I, MILLARD GILMORE, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Fire-Doors for Elevator- Shafts, &c., of which the following is a specification.

This invention relates particularly to firedoors and the uides therefor; and the primary object of the invention is to provide guides of improved construction, which will resist destruction in case of fire, so that the doors will be properly maintained in closed position.

The invention is illustrated in its preferred embodiment in the accompanying drawing, in which Figure 1 represents an inner broken elevational view of the wall of an elevatorshaft equipped with improved guides and a fire-door fitted thereto, in accordance with the invention; Fig. 2, a broken elevational view, showing on an enlarged scale a portion of one of the door-guides appearing at the lower portion of Fig. 1; Fig. 3, an end elevational view of the construction shown in Fig. 2; and Fig. 1, a broken horizontal section taken as, indicated, at line 4; on Fig. 1.

In the construction illustrated, A repre sents the wall of an elevator-shaft having an opening closed by a door composed of sec tions A, A and B, B, vertical guides connected with the inner surface of the wall A and extending along the lateral margins of the door-opening. j

The door-sections A, A are adapted to slide toward and away from each other, .and are joined by connections A whereby said sections serve to counterbalance each other. The lower door-section is equipped with a latchingdevice C, whichneed not be described in detail in this application.

The wall construction A may be of any approved type. Each of the guides B,- B comprises a bar or plate 1 connected with the inner surface of the wall A; an anglebar 2 having an 0ut-turned flange 3 parallel with the plane of the wall and secured to the outer margin of the bar 1, and having an inturned flange 4, which projects into the elevator-shaft; an angle-bar 5 having a flange 6 secured to the flange 4; and a flange 7 extending parallel with the wall and separated from the plate 1 by a space 8 which affords a guide-groove for the lateral flange 8 of the door-section. The guides B, B are continuous throughout the length of the elevator-shaft, but are provided at suitable intervals with expansion-joints B According to the preferred manner of providing the expansion-joint, the bar 1 is interrupted at intervals (in each story, if preferred)-by a space 9 adapted to allow for expansion, in case of fire; the angle-bar 2 is interrupted by a space 10; and the angle-bar 5 is interrupted by a space ll,spaces 9, 10 and 11 bearing a staggered relation to each other. Thus, the angle-bars 2 and. 5 are continuous across the space 9 of the plate 1; the plate 1 and the angle-bar 5 are continuous across the space 10; and the plate 1 and the angle-bar 2 are continuous across the spacelO. The plate 1 and angle-bar 2 are connected with the wall A by cap-bolts 12 which pass through slots 13 in the metal parts; and the flanges 4 and 6 of the angle-bars 2 and 5 are connected by rivets or bolts 14 which extend through slots 15 with which said flanges are provided.

ted to expand or lengthen, to compensate for heat, and this action will be permitted without dangerous distortion of the guides, so that the guides will still perform their function of maintaining the door properly in the closed position.

What I regard as new and desire to secure by Letters Patent is-- 7 In fa construction of the character set forth, a guide comprising three inetal bars, each ofsaidhars comprising sections separated'hy a space, the spaces bearing a staggeredrelation to each other, bo1t-and-slot connections joining" the. bar-sections together,

1 thus providing an expansion j oint,v andv means associated therewith; for normally reg strlcting the movement oi said bars-withrelongitudinal expansion of the bars.

MILLARD GILMORE. In the presence of- L..HEISLAR,.

NEE-DIE B. DnARBoR-N Copies of this patent may be fibtainedfionfiveicents each, by addressing the Commissioner of Patents,

' Washington; '17: G. 

